Integrated vibrating and sound producing device

Details Integrated vibrating and sound producing device Integrated vibrating and sound producing device

1994-05-06

1996-06-18

Chan, Wing F.

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Having electrostatic element

381194, 3403111, H04R 2500

Patent

active

055286976

ABSTRACT:
An integrated sound generator/vibrator has a higher frequency responsive sound producing body and a low frequency responsive vibrating body which may be operated simultaneously or separately. In one embodiment, a pole piece is anchored to the center of a spring body, and armatures are fastened to the center of a compliant diaphragm facing the pole piece. Magnets and excitation coils are fastened in a case to surround the pole piece. In another embodiment, a voice coil is fastened to the center of a compliant diaphragm, a magnet is anchored to the center of a spring body, and the diaphragm and spring body are positioned to face each other with the magnet centered in the voice coil. In a variation of the second embodiment, a magnetic unit comprising a pole piece, a ring magnet, and a yoke is attached to the spring body. The magnetic circuit in each design selectively produces a high frequency field which operates the high frequency diaphragm, and/or a low frequency field which moves the pole piece or central magnet on the spring body to cause vibrations.

REFERENCES:
patent: 3178512 (1965-04-01), Ashworth
patent: 3449531 (1969-06-01), Ashworth
patent: 4151379 (1979-04-01), Ashworth
patent: 4251807 (1981-02-01), Hofer et al.
patent: 4720868 (1988-01-01), Hirano
patent: 5107540 (1992-04-01), Mooney et al.
patent: 5172092 (1992-12-01), Nguyen et al.

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